I think this is a new problem. I am not finding the post about the recent updates to the codes so I apologize for not posting this there. This is new behavior.
I was adding a spouse. The date for the marriage I copied had an extra space (e.g. January [space space] 4, 1846) which has always resulted in an error saying the date is not in the correct format; removing the extra space fixes the problem. I frequently get/make this mistake. However, this time when I went to correct the date, I found that all the text i had added to the notes/bio section had been deleted